Tường chống thấm xi măng đất tạo bởi khoan phụt cao áp định hướng

Abstract

Directional Jet Grouting technique is developed on the basic of Jet Grouting technique by controlling the jetting angle to create a soil cement water-cutoff wall in a panel shape. Directional Jet Grouting technique has been used popularly in the world and introduced in the high pressure grouting standards of Europe - EN 12716:2001 and of China - DL/T 5200-2004, but not applied in Vietnam yet. Based on authors’s experiences in research and application of Jet Grouting in the last decade in Vietnam, and on the successful application of Directional Jet Grouting in foreign countries, this paper aimed to make a review on principles, parameters of design and construction, evaluation methods of the quality of soil cement wall created by Directional Jet Grouting. Results on an application of this technique for peameable rehabitan of earth dam in China are also introduced. International experiences show that Directional Jet Grouting is a proper method for seepage treatment of foundation and body of dikes, earth dams and deep excavations. 

Key words: Jet Grouting, Directional Jet Grouting, Soil cement wall, Seepage rehabilitation.